Apparatus for forming valve-seats



w. E. COAKLEY. APPARATUS FOR FORMING VALVE SEATS.

APPLICATION F ILED DEC. 7, 19!].

Patented Feb. 1, 1921.

UNITED STA'I:

PATENT OFFICIE.

wrntreivt E. COAKLEY, or CLEVELAND, OHIO, nssionon. to THE OHIO nonr aBLOWER COMPANY, or CLEVELAND, 01110, A oonronarron or or-rto.

APYARATUS FOR FORMING VALVE-SEATS Specification of Letters Patent.

Patented Feb. 1, ltttll,

Application filed December 7, 1917. Serial No. 206,093.

This invention relates to apparatus for forming valve seats.

Hereto'lfore, valve seats of: the nature produced by my improvedapparatus have been formed by grinding or cutting away the metal andthis has necessitated the use of a.

lathe, requiring great'care in setting up the work, an operationincident to the use of machines of this class. Furthermore, equal carehadto be exercised in grinding or cutting the seat smoothly and to theproper depth and degree of taper. Such practice, involving so much laborand skill, obviously made the production of valve seats slow andexpensive.

My invention comprehends means for producing valve seats by swaging thematerial surrounding an aperture in the. member that is to have thevalve seat thus, preferably by a single blow, to impart the desired sizeand shape to the seat, the swaging operation further having the efiectoi compressing and consequently hardening the material in the immediateregion of the seat, thereby enhancing its wearing qualities. Furthermoreby this means, the surface of the seat may be made as smooth asthe sur-:laee oi the swage itself (within the limitations oi? the quality oi?material wherein the seat is termed), and the swage of course may begiven a highly finished working surface.

Other objects of the invention are to provide comparatively simpleapparatus of this character through which valve seats may be rapidly andeconomically produced by un- .;z;lnlled workmen; which is convenient ofoptnntion and winch 1s readily adyustable to adapt it to the productionof valve seats of various diameters. A further object comprehended by myinvention and realized through one of the present embodiments theprovision of a swaging tool which serves not only to form the seat, butto properly locate in the machine the inemberuvhercih the seat is to beformed.

The foregoing objects, and. others which Wlll become apparent as thisdescription procoeds, are attained in the constructions ill. .strated inthe accompanying drawn wherein Figure 1. is a side elevation of amachine embodying my invention; 2 is a tional detail of a blanlt memberwherein valve seats are adapted to be formed by the machine illustratedin 1; liig ii is a similar view of the 111G111l. .1 after the valveseats have been formed therein; Fig. 4.- is a perspective view oi? thesame; l 's view, similar to l. of a inodiilied :torni oi? the machineand l: 6 a sectional. plan immediately above the Work support oi. liig.I). as indicated by the line 6 6.

The form of machine shown in .1. comprises a base 1. and a head 2, thelatter the front portion of the base and has a. bore 4t in verticalalinement with a hole 5 of the base. A depression 6 is formed in the topof the base at the front. and in it is as toned a hardened. plate 7 asbyscrewed, the plate having an aperture 9 that opens into the hole 5. A.swage 10 is guided within the bored, and its lower end 1.1. is shown asconical and as possessing the same degree oi? it .per as that to begiven the valve A. guide 15, consisting ol? a rod, iron] and is carriedby the swage l0, and this red is graduated as indicated at 16 wherebythe location of an adjustable collar 18 may be determined as hereinafterexplained. The collar is held tothe red by a set screw A weight 20 isslidable freely upon the rod 15 between the upper. end oi? the sways and the collar 18; 1

In the use oi. the present term oil: my invention, the operator the rod15 and lifts the swage 1.0 high enough. to permit a. member or element22 wherein the valve seat is to be formed, to be placed upon the liftplate 7 with its aperture 23 approximately in register with the opening9 of the plate He then lowers the swage so that its tapered end mayenter the aperture of the member and accurately center or position itwith respect to the swage. Leaving the swage in this position, theoperator elevates the weight 20 until it attains the height of thecollar 18, when he allows it to drop'and impose a blow upon the upperend of the swage 10 with the result that the seat is formed within theupper end of the aperture of the member'22, the seat being indicated, inFigs. 3 and 1, at 24-. He then elevates the'swage as before, inverts themember 22, lowers the swage into contact with the member, and thenelevates and drops the weight to form a valve seat at the opposite endof the aperture.

There is a rather important relation eXist-' ing between the heft of theweightplus thatolt' the swage, rod and collar-and the height to whichthe weight is elevated before it is released, which determines the poweroi the blow that is imparted to the element or member 22, and thisrelation may be altered through the adjustment of the collar 18 to varythe power of the blow according to the size of valve seat that is to beformed. It is clear that a valve seat of comparatively small diameterwould require a lighter .blow' than one oi considerably greaterdiameter, for in the latter instance ings by modifying'the machine asiliusnotch 9 into which a piece of work 25 be inserted, the work, 111the present case,

tratedin Fig. 5. Here a plate 7 is set within the base 1" and isprovided with a may consisting oi a casing having a flange 26 whichrests upon the portion of the plate surrounding the notch 99. The casingis further provided with bores 27 and 28 of difi'erent diameters betweenwhich a shoulder 29 is formed, it being designed to have a valve seat 30formed within the end of the bore 27 adjacent the shoulder 29.

10 is a swage that is adapted to be dropped into the bore 28 of thepiece of work before the latter is placed in the machine, the lowerconical end 11 of the swage projecting into the bore 27. As the flange26 is slid in upon 'therea-bove, a blow memes the plate 7, the upper endof the swage engages the inclined edge portion of the lower end of ahammer 33 that is guided within the bore l of the head 2, elevating thehammer slightly and supporting it with its enlarged upper end 34: off ashoulder 35 that is formed by the enlargement oi the upper end of thebore 4i. Qr guide 15 is carried by the hammer 35 and a wei ht 20 isreciprocable thereon so that by raising the weight as in the former caseand allowing it to drop, it will impart a blow, through the hammer 83,to the swage 10 of sufiicient power to produce the valve seat 30.

Having thus described my invention what I claim is:-

1. In apparatus for forming valve seats, the combination of a worksupport, a swage having a forming surface corresponding in shape to thescat engaging surface of the valve wherewith the seat is designed foruse, the swage being arranged to engage a piece of work on the support,and means for imparting a blow to the swage thereby to deform the workand impose upon it the shape of the forming surface of the swage.

2. In apparatus for forming valve seats, the combination of a worksupport, a swage arranged to. engage a piece of work on the support, aguide carried by the swage, and a weight slidable along the guide.

3. In a machine for forming valve seats, the combination of a base, ahead supported above the base, a swage sustained by the head and movabletoward and from the base, a guide carried by the swage, and a weight:slidable along the guide.

4-. In a machine for forming valve seats, the combination of a base, ahead supported imparting member sus tained by the head, a guide carriedby said member, and weight slidable along the guide and adapted whendropped to impart a blow of given power to the member.

5. In apparatus for forming valve seats, the combination of a orksupport, a blow imparting member arranged in operative relation to apiece of work on said support, a weight, a guide for directing theweight into operative engagement with the member, and a stop adjustablealong the guide for limiting the movement of the weight, the guidehaving graduations indicating prcdetermined adjustments of. the stop.

6. In apparatus for iiorming valve seats in apertured members, thecombination of a support for said member, a swagc having a taperedportion which corresponds in shape to the seat engaging portion of thevalve wherewith the seat is designed for use, the swage being arrangedto be placed with its tapered por ion within the aperture of the member,and means for imparting a blow of given power to the swage.

lll)

T. In apparatus for formin r valve seats member, and a weight ofgivenheft arranged in apertured members, the com ination of a to bedropped from a given height upon the 10 support for said member, a swagehaving a swage :t'or imposing a blow of given power tapered portionwhich corresponds in shape thereon. to the seat engaging portion of thevalve In testimony whereof I hereunto aflix my wherewith the seat isdesigned for use, the signature. swage being arranged to be placed withits tapered portion Within the aperture of the WILLIAM COAKLEY.

